Patent US3409412A successfully refreshed from Google Patents.
US3409412A
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Process for producing butterfly twin barium titanate single crystals and barium titanate mixture used therein
Assignee: Panasonic Holdings Corp
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Filing: 1965-12-08
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Granted: 1968-11-05
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Expires: 1985-12-08
Abstract
No abstract record available.
Inventors
- 👤 Sasaki Hiromu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:04
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/51; C04B35/01; C04B35/46; C04B35/48; C04B35/50; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/32; C30B9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
THE PROCESS OF PRODUCING BUTTERFLY TWIN CRYSTALS OF BARIUM TITANATE IN A LARGE SIZE COMPRISING THE STEPS OF ADDING BARIUM TITANATE POWDER TO A FLUX MATERIAL WHICH IS A SOLVENT THEREFOR, HEATING THE MIXTURE OF BARIUM TITANATE AND FLUX TO AN ELEVATED TEMPERATURE TO FORM A MELT, MAINTAINING THE SAID MIXTURE AT THE SAID ELEVATED TEMPERATURE FOR A PERIOD OF TIME DURING WHICH A PORTION OF THE BARIUM TITANATE DISSOLVES, THE RATIO OF BARIUM TITANATE TO FLUX IN SAID MIXTURE BEING GREATER THAN THE SOLUBILITY LIMIT OF BARIUM TITANATE IN THE FLUX MATERIAL AT THE SAID ELEVATED TEMPERATURE, AND COOLING THE MELT TO PROMOTE THE CRYSTAL GROWTH, THE SAID BARIUM TITANATE POWDER COMPRISING (A) 50 TO 80 WIGHT PERCENT OF BARIUM TITANATE WHEREIN THE MOLAR RATIO OF BARIUM OXIDE TO TITANIUM DIOXIDE IS 0.60 TO 0.85 AND (B) 20 TO 50 WEIGHT PERCENT OF BARIUM TITANATE WHEREIN THE MOLAR RATIO OF BARIUM OXIDE TO TITANIUM OXIDE IS 1.0 TO 1.5.
Claim 2
Dependent Claim
160 words
THE PROCESS OF PRODUCING BUTTERFLY TWIN CRYSTALS OF BARIUM TITANATE IN A LARGE SIZE COMPRISING THE STEPS OF ADDING BARIUM TITANATE POWDER TO A FLUX MATERIAL WHICH IS A SOLVENT THEREFOR, HEATING THE MIXTURE OF BARIUM TITANATE AND FLUX TO AN ELEVATED TEMPERATURE TO FORM A MELT, MAINTAINING THE SAID MIXTURE AT THE SAID ELEVATED TEMPERATURE FOR A PERIOD OF TIME DURING WHICH A PORTION OF THE BARIUM TITANATE DISSOLVES, THE RATIO OF BARIUM TITANATE TO FLUX IN SAID MIXTURE BEING GREATER THAN THE SOLUBILITY LIMIT OF BARIUM TITANATE IN THE FLUX MATERIAL AT THE SAID ELEVATED TEMPERATURE, AND COOLING THE MELT TO PROMOTE THE CRYSTAL GROWTH, THE SAID BARIUM TITANATE POWDER COMPRISING (A) 50 TO 80 WIGHT PERCENT OF BARIUM TITANATE WHEREIN THE MOLAR RATIO OF BARIUM OXIDE TO TITANIUM DIOXIDE IS 0.60 TO 0.85 AND (B) 20 TO 50 WEIGHT PERCENT OF BARIUM TITANATE WHEREIN THE MOLAR RATIO OF BARIUM OXIDE TO TITANIUM OXIDE IS 1.0 TO 1.5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |